Plastic in oceans 'threatens food chain'

As England prepares to introduce a charge for plastic bags, BBC science editor David Shukman speaks to Professor Tamara Galloway about the possible threat to the food chain, by the plastics broken down into tiny fragments in our oceans.

Professor Tamara Galloway has been researching the effects of microplastics on marine wildlife and how ingestion of these objects by some of the smallest creatures in the ocean can have implications for the rest of the food chain.

The report appeared on the BBC1 news and World Service and can ve view on the BBC website.